SW6200404_Supplement-EZ Form_20221123

SUPPLEMENT-EZ COVER PAGE
FORMSLOAD�D
PROJECT INFORMATION
1 Project Name SOF Group Support Battalion (GSB) TEMF
2 Project Area ac 16.2
3 Coastal Wetland Area ac 0
4 Surface Water Area (ac) 0
5 Is this proect High or Low Density? High
6 Does this project use an off -site SCM? No
COMPLIANCE WITH 021-1.1003(4)
7 Width of vegetated setbacks
8 Will the vegetated setback rei
9 if BUA is proposed in the sett
10 Is streambank stabilization pr
does it meet NCAC 02H.1
ad on this project?
30+
Yes
No
_ No
NUMBER AND TYPE OF SCMs:
11 Infiltration System
12 Bioretention Cell
13 Wet Pond
14 Stormwater Wetland
15 Permeable Pavement
16 'Sand Filter
1
17
lRainwater Harvesting RWH
18
Green Roof
19
Level Spread er-Filter Strip LS-FS
20
Disconnected Impervious Surface DIS
21
1 Treatment Swale
22
Dry Pond
23
StormFilter
24
Silva Cell
25
Bayfilter
26
_
iFilterra
FORMS LOA-,
DESIGNER CERTIFICATION
27
IName and Title:
Matthew Haley, P.E.
28
fOrganization,
Cape Fear Engineerin , Inc.
29
Street address:__
151 Poole Road Suite 100
30
City, State, Zip:
Leland, NC, 28451
31
Phone number(s):
[phone]
32
Email:
[e-mail]
Certification Statement:
I certify, under penalty of law that this Supplement-EZ form and all supporting information were prepared under my direction or supervision; that the
information provided in the form is, to the best of my knowledge and belief, true, accurate, and complete; and that the engineering plans,
specifications, operation and maintenance agreements and other supporting information are consistent with the information provided here.
w��,r�4iin�cegaJd�gr ,�
09/21 /22
Signature of Designer
Date

DRAINAGE AREAS
1 Is this a high density Project? Yes
2 If so, number of drainage areas/SCMs 1
3 Does this project have low density areas? No
11-versions?
If so number of low density drainage areas 0
Is all/part of this project subject to previous rule
No
FORMS LOADED
DRAINAGE AREA INFORMATION Entire Site 1
4 Type of SCM Wet Pond
5 Total drainage area (sq ft705672
6 Onsite drainage area (sq ft705672
7 Offsite drainage area (sq ft0
8 Total BUA in project (sq ft588727 sf Increased by 11,993 sf
New BUA on subdivided lots (subject to
9permitting) s ft
New BUA not on subdivided lots (subject to
10 Dermittina) (sf)
BUA (sq ft) I
12 113reakdown of new BUA not on subdivided lots: _
Parkin (sq ft) 404305 sf
Sidewalk (sq ft)
Roof (sq ft) 75971 sf
Roadway sq ft)
Future (sq ft) 0 sf
Other, please specify in the comment box
below s ft 108451 sf
New infiltrating permeable pavement on
13 subdivided lots (sq ft)
New infiltrating permeable pavement not on
14 subdivided lots (sq ft)
Existing BUA that will remain (not subject to
15 permitting) (sq ft)
16 Existing BUA that is already permitted (sq ft
17 Existing BUA that will be removed Lq_ft)__
18 Percent BUA 83%
19 Design storm (inches) 1.0 in
20 Design volume of SCM (cu ft) 100831 cf�
21 Calculation method for design volume HIRT
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
22 drainage area(s):
"Other" BUA of 108,451 sf consists of aggregate surface in the existing
GSB TEMF site and the proposed SOF SSA site.
90,673
Decreased by 152,460 sf
Increased by 43,111 s

WET POND
1 Draina a area number 1
2 Minimum required treatment volume (cu ft) 100831 cf
-GENE
3
DC FROM 02H .1050
Is the SCM sized to treat the SW from all surfaces at build -out?
Is the SCM located away from contaminated soils?
W hat are the side slopes of the SCM H:V ?
Does the SCM have retaining walls, gabion walls or other engineered
side slopes?
4
5
6
7'Are
the inlets, outlets, and receiving stream protected from erasion
10- ear storm)?
8
Is there an overflow or bypass for inflow volume in excess of the
desi n volume?
9
What is the method for clewatering the SCM for maintenance?
10
If applicable, will the SCM be cleaned out after construction?
11
Does the maintenance access comply with General MDC 8 ?
12
Does the drainage easement comply with General MDC 9 ?
13
If the SCM is on a single family lot, does (will?) the plat comply with
General MDC 10 ?
14
Is there an O&M Agreement that complies with General MDC (11)?
15
Is there an O&M Plan that complies with General MDC 112j?
Does the SCM follow the device specific MDC?
Was the SCM designed by an NC licensed professional?
MDC FROM 02H .1053
Sizing method used
Has a stage/storage table been provided in the calculations?
Elevation of the excavated main pool depth (bottom of sediment
removal) (fmsl
Elevation of the main pool bottom (top of sediment removal) (fmsl)
Elevation of the bottom of the vegetated shelf (fmsl)
Elevation of the permanent pool (fmsl)
Elevation of the top of the vegetated shelf fmsl)
Elevation of the temporary pool (fmsl)
Surface area of the main permanent pool (square feet)
Volume of the main permanent pool (cubic feet) 1
Average depth of the main pool (feet)_
Average depth equation used E,
If using equation 3, main pool perimeter (feet)
16
17
WET POND
18
19
20
21
22
23
24
25
26
27
28
29
30
Yes
Yes
3:1
No
Yes
Yes
Other
Yes
Yes
Yes
N/A
Yes
Yes
Yes
Yes
HRT
Yes
136.00
?37.00
?43.00
?42.50
r44.00
r45.50
24185
8621 cf
300ft
cation 2
31 If using equation 3, width of submerged veg. shelf (feet) _
32 Volume of the forebay (cubic feet) _
33 Is this 15-20 % of the volume in the main pool?
34 Clean -out depth for forebay (inches)
35 Design volume of SCM (cu ft)
36 Is the outlet an orifice or a weir? _
37 If orifice orifice diameter inches)
38 If weir, weir height (inches)
39 If weir, weir length inches
1 8930.0 ft
_ Yes
12 in
100831 cf
Orifice
6 in
40
Drawdown time for the tem ors ool days)
2.9
41 Are the inlet(s) and outlet located in a manner that avoids short-
Yes
circuiting?
42 Are berms or baffles provided to improve the flow path?
No
43 Depth of forebay at entrance (inches1
48 in
44 Depth of forebay at exit (inches) --
48 in
45 Does water flow out of the forebay in anon -erosive manner?�
Yes
46 Width of the vegetated shelf (feet) _'
6 ft
47 Slo e of vegetated shelf (H:V)
10:1
48 Does the orifice drawdown from below the top surface of the
No_..
permanentpool?
49 Does the pond minimize impacts to the receiving channel from the 1-
Yes
24-hr storm?
50 Are fountains proposed? (If Y, please provide documentation that
No
MDC(9) is met.)
�51 Is a trash rack or other device provided to protect the outlet system? i
Yes
52 Are the dam and embankment planted in non -clumping turf grass?
Yes
53 Species of turf that will be used on the dam and embankment Sod (Zoysia)
54 Has a planting plan been provided for the vegetated shelf?
Yes
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
55
wet pond(s)-
1,1jet Pond 1 12:44 PM 9/21/2022